AD574ATE/883B - 12-Bit SAR ADC, Military Grade | Analog Devices
MPN： AD574ATE/883B ✓ 啟用中AD574ATE/883B 概覽
An analog-to-digital converter (ADC) is an electronic component that converts continuous analog signals into discrete digital numbers. The AD574A is a successive-approximation ADC, which uses a binary search algorithm to determine the digital output, offering a good balance of speed and resolution. As a 12-bit ADC, it provides 4096 discrete levels, enabling high-resolution measurement of analog signals. This device belongs to the family of data acquisition components, which are essential in bridging the analog and digital domains in systems such as industrial process control, military avionics, and scientific instrumentation.
Key features of the AD574ATE/883B include 12-bit resolution, a single input channel, and a successive-approximation register (SAR) architecture. It operates from a bipolar power supply, and its parallel word access allows for fast data transfer to microprocessors. The device is available in a 28-LCC package, which is suitable for surface-mount assembly and provides good thermal and electrical performance. The military-grade processing ensures reliability in harsh environments, with a temperature grade of MILITARY, indicating operation from -55°C to +125°C.
Technically, the AD574A integrates a precision voltage reference and clock on-chip, eliminating the need for external components. The Bipolar/I2L process enables high-speed operation and low power consumption. The device includes a 3-state output buffer, allowing direct connection to a microprocessor bus without additional interface logic. The conversion time is typically 25 microseconds, providing a throughput of 40 kSPS. The device also features a status output to indicate when conversion is complete, simplifying system integration.
Typical applications include military avionics, industrial process control, medical instrumentation, and scientific data acquisition systems. The AD574ATE/883B is particularly suited for applications requiring high accuracy and reliability in extreme environments, such as aerospace and defense systems. Its parallel interface simplifies connection to microcontrollers and DSPs, making it a versatile choice for embedded systems.
When designing with this device, ensure proper decoupling of the power supply pins and a clean analog ground to achieve specified accuracy. The reference voltage is internally generated, but external filtering may be required for optimal performance. The device is not RoHS compliant due to its military-grade hermetic package, which is a consideration for applications with environmental compliance requirements.
直接替換替代品，適用於 AD574ATE/883B — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： AD574ATE/883B （相同外形與佔位） — 差異在於 RoHS Status, Supply Voltage.
AD574AUD/883B
✅ 直接替換📋 參考替代品（不在目錄中）
AD574ASE/883B
✅ 直接替換聯絡詢價
查看資料表 →AD574ATE/883B 最大額定值與電氣特性
| 解析度 | 12 bit |
| Number of Inputs | 1 |
| Input Type | Single Ended |
| Architecture | SAR |
| Data Interface | Parallel |
| Reference Type | Internal |
| 供應電壓 | 5V, ±12V/±15V |
| 工作溫度 | -55°C to +125°C |
| 封裝 | 28-LCC (11.43x11.43) |
| 安裝類型 | Surface Mount |
| Temperature Grade | Military |
| Terminal Form | No Lead |
| Number of Terminals | 28 |
| Package Code | QCCN |
| Package Shape | Square |
| RoHS 狀態 | Non-compliant |
| MIL-STD-883C | Class B |
AD574ATE/883B 腳位配置
| 腳位 1 | VLOGIC — Logic supply voltage |
| 腳位 2 | 12/8 — Data format select |
| 腳位 3 | CS — Chip select |
| 腳位 4 | R/C — Read/convert |
| 腳位 5 | CE — Chip enable |
| 腳位 6 | VEE — Negative supply |
| 腳位 7 | REF OUT — Reference output |
| 腳位 8 | AGND — Analog ground |
| 腳位 9 | REF IN — Reference input |
| 腳位 10 | VCC — Positive supply |
| 腳位 11 | BIP OFF — Bipolar offset |
| 腳位 12 | 10V IN — 10V analog input |
| 腳位 13 | 20V IN — 20V analog input |
| 腳位 14 | DGND — Digital ground |
| 腳位 15 | DB0 — Data bit 0 (LSB) |
| 腳位 16 | DB1 — Data bit 1 |
| 腳位 17 | DB2 — Data bit 2 |
| 腳位 18 | DB3 — Data bit 3 |
| 腳位 19 | DB4 — Data bit 4 |
| 腳位 20 | DB5 — Data bit 5 |
| 腳位 21 | DB6 — Data bit 6 |
| 腳位 22 | DB7 — Data bit 7 |
| 腳位 23 | DB8 — Data bit 8 |
| 腳位 24 | DB9 — Data bit 9 |
| 腳位 25 | DB10 — Data bit 10 |
| 腳位 26 | DB11 — Data bit 11 (MSB) |
| 腳位 27 | STS — Status output |
| 腳位 28 | NC — No connect |
典型應用
AD574ATE/883B 適用於 6 應用s: Military Avionics, Industrial Process Control, Medical Instrumentation, Scientific Data Acquisition, Aerospace and Defense, Test and Measurement.
Military Avionics
The AD574ATE/883B is ideal for military avionics data acquisition systems due to its MIL-STD-883C Class B processing and wide operating temperature range of -55°C to +125°C. Its 12-bit resolution and parallel interface enable precise conversion of analog sensor signals for flight control and navigation systems. The ceramic LCC package ensures reliability under vibration and thermal stress, making it suitable for harsh aerospace environments.
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Industrial Process Control
In industrial process control, the AD574ATE/883B provides high-accuracy conversion of analog signals from sensors such as temperature, pressure, and flow. Its 12-bit resolution and internal reference simplify design, while the parallel interface allows direct connection to microcontrollers. The device's military-grade temperature range ensures stable operation in factory environments with extreme temperatures. The LCC package is suitable for compact control modules.
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Medical Instrumentation
The AD574ATE/883B is used in medical instrumentation such as patient monitoring systems and diagnostic equipment. Its high accuracy and reliability are critical for precise measurement of physiological signals. The device's parallel interface facilitates integration with digital signal processors for real-time analysis. The military temperature range ensures performance in various clinical environments, and the hermetic ceramic package provides protection against moisture and contaminants.
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Scientific Data Acquisition
For scientific research, the AD574ATE/883B offers the precision and stability required for accurate data acquisition. Its 12-bit resolution and internal reference ensure consistent measurements, while the parallel interface allows high-speed data transfer to computers. The device's wide temperature range makes it suitable for field experiments in extreme conditions. The LCC package is ideal for compact data loggers and instrumentation.
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Aerospace and Defense
The AD574ATE/883B is designed for aerospace and defense applications requiring high reliability and performance. Its MIL-STD-883C Class B processing ensures it meets stringent military standards. The device's 12-bit resolution and parallel interface are suitable for radar, communication, and guidance systems. The ceramic LCC package provides excellent thermal conductivity and mechanical strength, essential for withstanding extreme conditions.
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Test and Measurement
In test and measurement equipment, the AD574ATE/883B provides accurate analog-to-digital conversion for oscilloscopes, multimeters, and data loggers. Its 12-bit resolution and parallel interface enable fast data acquisition and processing. The device's wide temperature range ensures stable performance in laboratory and field environments. The LCC package is suitable for high-density PCB designs, allowing compact instrument designs.
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推薦產品摘要
工程參考資料，適用於 AD574ATE/883B — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | AD574AUD/883B | AD574ATD/883B | AD574ASE/883B | AD574ASD/883B | AD1674TD/883B | ADS774JU |
|---|---|---|---|---|---|---|---|
| Package | 28-LCC (11.43x11.43) | 28-LCC (11.43x11.43) | 28-CDIP | 28-LCC (11.43x11.43) | 28-CDIP | 28-CDIP | 28-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR | SAR |
| Input Channels | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Data Interface | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel |
| Operating Temperature | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | -55°C to +125°C | 0°C to +70°C |
| MIL-STD-883C | Class B | Class B | Class B | Class B | Class B | Class B | No |
主要差異化特點
- Military-grade processing (對比ADS774JU)
- Ceramic LCC package (對比AD574ATD/883B)
- Internal reference and clock (對比ADS774JU)
設計說明
The AD574ATE/883B requires multiple supply voltages: +5V for logic, and ±12V or ±15V for the analog section. Ensure that these supplies are well-regulated and decoupled with 0.1uF ceramic capacitors close to the VCC, VEE, and VLOGIC pins. A 10uF tantalum capacitor on each supply is recommended for low-frequency noise filtering.
For optimal performance, use a ground plane and separate analog and digital ground areas, connecting them at a single point near the ADC. Keep analog input traces short and shielded from digital signals to minimize noise coupling. The LCC package has exposed pads; ensure proper soldering to the PCB for mechanical stability and thermal dissipation.
Do not exceed the absolute maximum ratings for supply voltages, as this can damage the device. Ensure that the analog input voltage does not exceed the specified range (0-10V or 0-20V depending on configuration). The internal reference is trimmed at the factory; avoid loading the REF OUT pin with low-impedance circuits, as this can degrade accuracy.
合規資訊
Military-grade component, not RoHS compliant due to hermetic ceramic package.
